EBG focal feed improvements for Ka-Band multibeam space applications

Cyrille Menudier (1) , Régis Chantalat (2, 1) , Eric Arnaud (1) , Marc Thevenot (1) , Thierry Monédière (1) , Patrick Dumon

1 OSA
2 CISTEME - Centre d'Ingénierie des Systèmes en Télécommunication, en ÉlectroMagnétisme et en Electronique

This letter presents the enhancement of an electromagnetic band-gap (EBG) antenna that is used to feed a reflector antenna for a space multibeam application in Ka band. One of the main difficulties in a typical focal feed cluster design is to obtain high illumination performances with neighbored and close radiating elements. The new structure presented in this letter tackles this difficulty by using a two-level EBG antenna as a multibeam focal feed. This last one is designed to illuminate a side-fed offset cassegrain antenna (SFOCA) working in Ka band and dedicated to a multibeam telecommunication coverage over Europe. A prototype has been measured, and the reflector antenna performances have been evaluated in order to show the good results obtained with this new multibeam focal feed.

Domaines: Sciences de l'ingénieur [physics]; Electronique

Cyrille Menudier, Régis Chantalat, Eric Arnaud, Marc Thevenot, Thierry Monédière, et al.. EBG focal feed improvements for Ka-Band multibeam space applications. IEEE Antennas and Wireless Propagation Letters, 2009, 8, pp.611-615. ⟨10.1109/LAWP.2009.2021779⟩. ⟨hal-00480368⟩